diff --git a/kingfisher_scrapy/base_spider.py b/kingfisher_scrapy/base_spider.py
index e2db8936..ddbdeab9 100644
--- a/kingfisher_scrapy/base_spider.py
+++ b/kingfisher_scrapy/base_spider.py
@@ -308,7 +308,7 @@ def start_requests(self):
     @handle_error
     def parse(self, response):
         if self.zip_file_format:
-            self.build_file_from_response(response, data_type='zip', post_to_api=False)
+            yield self.build_file_from_response(response, data_type='zip', post_to_api=False)
 
         zip_file = ZipFile(BytesIO(response.body))
         for finfo in zip_file.infolist():
diff --git a/kingfisher_scrapy/commands/dryrun.py b/kingfisher_scrapy/commands/dryrun.py
new file mode 100644
index 00000000..f7c35a71
--- /dev/null
+++ b/kingfisher_scrapy/commands/dryrun.py
@@ -0,0 +1,47 @@
+from scrapy.commands import ScrapyCommand
+from scrapy.crawler import CrawlerProcess
+
+from kingfisher_scrapy.base_spider import BaseSpider, ZipSpider
+
+
+def yield_nothing(*args, **kwargs):
+    yield
+
+
+class DryRun(ScrapyCommand):
+    def short_desc(self):
+        return 'Run a dry run of all spiders'
+
+    def run(self, args, opts):
+        BaseSpider.parse_json_lines = yield_nothing
+        ZipSpider.parse = yield_nothing
+
+        # Stop after one item or error.
+        self.settings.set('CLOSESPIDER_ERRORCOUNT', 1)
+        self.settings.set('CLOSESPIDER_ITEMCOUNT', 1)
+
+        # Disable Kingfisher, Telnet, LogStats extensions.
+        self.settings.set('EXTENSIONS', {
+            'scrapy.extensions.telnet.TelnetConsole': None,
+        })
+        self.settings.set('LOGSTATS_INTERVAL', None)
+
+        runner = CrawlerProcess(settings=self.settings)
+
+        exceptions = {
+            'test_fail',
+            # Server unavailable
+            'mexico_cdmx',
+            # Require authentication
+            'openopps',
+            'paraguay_dncp_records',
+            'paraguay_dncp_releases',
+            'paraguay_hacienda',
+        }
+
+        for spider_name in runner.spider_loader.list():
+            if spider_name not in exceptions:
+                spidercls = runner.spider_loader.load(spider_name)
+                runner.crawl(spidercls)
+
+        runner.start()
diff --git a/kingfisher_scrapy/extensions.py b/kingfisher_scrapy/extensions.py
index 297dd9af..1cc151f0 100644
--- a/kingfisher_scrapy/extensions.py
+++ b/kingfisher_scrapy/extensions.py
@@ -17,8 +17,13 @@ def __init__(self, directory):
     @classmethod
     def from_crawler(cls, crawler):
         directory = crawler.settings['FILES_STORE']
+
+        if not directory:
+            raise NotConfigured('FILES_STORE is not set.')
+
         extension = cls(directory)
         crawler.signals.connect(extension.item_scraped, signal=signals.item_scraped)
+
         return extension
 
     def item_scraped(self, item, spider):
diff --git a/kingfisher_scrapy/log_formatter.py b/kingfisher_scrapy/log_formatter.py
index 9e0b42bd..a7298837 100644
--- a/kingfisher_scrapy/log_formatter.py
+++ b/kingfisher_scrapy/log_formatter.py
@@ -1,7 +1,7 @@
-from scrapy import logformatter
+from scrapy.logformatter import LogFormatter
 
 
-class KingfisherLogFormatter(logformatter.LogFormatter):
+class KingfisherLogFormatter(LogFormatter):
     # https://docs.scrapy.org/en/latest/_modules/scrapy/logformatter.html#LogFormatter.scraped
     def scraped(self, item, response, spider):
         """
diff --git a/kingfisher_scrapy/settings.py b/kingfisher_scrapy/settings.py
index 53fc8d38..7db1f5bc 100644
--- a/kingfisher_scrapy/settings.py
+++ b/kingfisher_scrapy/settings.py
@@ -32,6 +32,9 @@
 
 # The maximum response size (in bytes) that downloader will download (default: 1073741824):
 DOWNLOAD_MAXSIZE = 4000000000
+DOWNLOAD_WARNSIZE = 0
+# Many spiders time out when using default of 180.
+DOWNLOAD_TIMEOUT = 360
 
 # The download delay setting will honor only one of:
 CONCURRENT_REQUESTS_PER_DOMAIN = 2
diff --git a/kingfisher_scrapy/spiders/armenia.py b/kingfisher_scrapy/spiders/armenia.py
index 04437cd2..10dc0ada 100644
--- a/kingfisher_scrapy/spiders/armenia.py
+++ b/kingfisher_scrapy/spiders/armenia.py
@@ -8,7 +8,7 @@ class Armenia(LinksSpider):
     name = 'armenia'
     data_type = 'release_package'
     next_pointer = '/next_page/uri'
-    next_page_formatter = parameters('offset')
+    next_page_formatter = staticmethod(parameters('offset'))
 
     def start_requests(self):
         url = 'https://armeps.am/ocds/release'
diff --git a/kingfisher_scrapy/spiders/australia.py b/kingfisher_scrapy/spiders/australia.py
index 60ec5dcf..49bed716 100644
--- a/kingfisher_scrapy/spiders/australia.py
+++ b/kingfisher_scrapy/spiders/australia.py
@@ -9,7 +9,7 @@
 class Australia(LinksSpider):
     name = 'australia'
     data_type = 'release_package'
-    next_page_formatter = parameters('cursor')
+    next_page_formatter = staticmethod(parameters('cursor'))
 
     def start_requests(self):
         url = f'https://api.tenders.gov.au/ocds/findByDates/contractPublished/' \
diff --git a/kingfisher_scrapy/spiders/chile_base.py b/kingfisher_scrapy/spiders/chile_base.py
index 1ec7fbe6..26552dab 100644
--- a/kingfisher_scrapy/spiders/chile_base.py
+++ b/kingfisher_scrapy/spiders/chile_base.py
@@ -9,7 +9,7 @@ class ChileCompraBaseSpider(SimpleSpider):
     custom_settings = {
         'DOWNLOAD_FAIL_ON_DATALOSS': False,
     }
-    download_timeout = 300
+
     limit = 100
     base_list_url = 'https://apis.mercadopublico.cl/OCDS/data/listaA%C3%B1oMes/{0.year:d}/{0.month:02d}/{1}/{2}'
 
diff --git a/kingfisher_scrapy/spiders/chile_compra_bulk.py b/kingfisher_scrapy/spiders/chile_compra_bulk.py
index 854d627d..b35a9d13 100644
--- a/kingfisher_scrapy/spiders/chile_compra_bulk.py
+++ b/kingfisher_scrapy/spiders/chile_compra_bulk.py
@@ -8,7 +8,6 @@ class ChileCompraBulk(ZipSpider):
     name = 'chile_compra_bulk'
     data_type = 'record_package'
 
-    download_warnsize = 0
     download_timeout = 99999
     custom_settings = {
         'DOWNLOAD_FAIL_ON_DATALOSS': False,
diff --git a/kingfisher_scrapy/spiders/colombia.py b/kingfisher_scrapy/spiders/colombia.py
index faedc130..92a97df0 100644
--- a/kingfisher_scrapy/spiders/colombia.py
+++ b/kingfisher_scrapy/spiders/colombia.py
@@ -10,7 +10,7 @@
 
 class Colombia(LinksSpider):
     name = 'colombia'
-    next_page_formatter = parameters('page')
+    next_page_formatter = staticmethod(parameters('page'))
 
     def start_requests(self):
         base_url = 'https://apiocds.colombiacompra.gov.co:8443/apiCCE2.0/rest/releases'
diff --git a/kingfisher_scrapy/spiders/colombia_bulk.py b/kingfisher_scrapy/spiders/colombia_bulk.py
index 2f1c4036..ee9e2427 100644
--- a/kingfisher_scrapy/spiders/colombia_bulk.py
+++ b/kingfisher_scrapy/spiders/colombia_bulk.py
@@ -17,7 +17,6 @@ class ColombiaBulk(ZipSpider):
     encoding = 'iso-8859-1'
     zip_file_format = 'json_lines'
 
-    download_warnsize = 0
     download_timeout = 99999
     custom_settings = {
         'DOWNLOAD_FAIL_ON_DATALOSS': False,
diff --git a/kingfisher_scrapy/spiders/dominican_republic.py b/kingfisher_scrapy/spiders/dominican_republic.py
index 18098a6c..0cde0c99 100644
--- a/kingfisher_scrapy/spiders/dominican_republic.py
+++ b/kingfisher_scrapy/spiders/dominican_republic.py
@@ -11,8 +11,6 @@
 class DominicanRepublic(BaseSpider):
     name = 'dominican_republic'
 
-    download_timeout = 360  # 6min
-
     def start_requests(self):
         yield scrapy.Request(
             'https://www.dgcp.gob.do/estandar-mundial-ocds/',
diff --git a/kingfisher_scrapy/spiders/georgia_records.py b/kingfisher_scrapy/spiders/georgia_records.py
index f9f7cef3..d2eefad7 100644
--- a/kingfisher_scrapy/spiders/georgia_records.py
+++ b/kingfisher_scrapy/spiders/georgia_records.py
@@ -7,7 +7,7 @@
 class GeorgiaRecords(LinksSpider):
     name = 'georgia_records'
     data_type = 'record_package'
-    next_page_formatter = parameters('page')
+    next_page_formatter = staticmethod(parameters('page'))
 
     def start_requests(self):
         url = 'https://odapi.spa.ge/api/records.json'
diff --git a/kingfisher_scrapy/spiders/georgia_releases.py b/kingfisher_scrapy/spiders/georgia_releases.py
index ee3ce55b..25437126 100644
--- a/kingfisher_scrapy/spiders/georgia_releases.py
+++ b/kingfisher_scrapy/spiders/georgia_releases.py
@@ -7,7 +7,7 @@
 class GeorgiaReleases(LinksSpider):
     name = 'georgia_releases'
     data_type = 'release_package'
-    next_page_formatter = parameters('page')
+    next_page_formatter = staticmethod(parameters('page'))
 
     def start_requests(self):
         url = 'https://odapi.spa.ge/api/releases.json'
diff --git a/kingfisher_scrapy/spiders/honduras_portal_records.py b/kingfisher_scrapy/spiders/honduras_portal_records.py
index c5f5ec69..542213a1 100644
--- a/kingfisher_scrapy/spiders/honduras_portal_records.py
+++ b/kingfisher_scrapy/spiders/honduras_portal_records.py
@@ -9,7 +9,7 @@ class HondurasPortalRecords(LinksSpider):
     data_type = 'record_package'
     data_pointer = '/recordPackage'
     next_pointer = '/next'
-    next_page_formatter = parameters('page')
+    next_page_formatter = staticmethod(parameters('page'))
 
     download_delay = 0.9
 
diff --git a/kingfisher_scrapy/spiders/honduras_portal_releases.py b/kingfisher_scrapy/spiders/honduras_portal_releases.py
index ca4c56f1..a32bf9e8 100644
--- a/kingfisher_scrapy/spiders/honduras_portal_releases.py
+++ b/kingfisher_scrapy/spiders/honduras_portal_releases.py
@@ -9,7 +9,7 @@ class HondurasPortalReleases(LinksSpider):
     data_type = 'release_package'
     data_pointer = '/releasePackage'
     next_pointer = '/next'
-    next_page_formatter = parameters('page')
+    next_page_formatter = staticmethod(parameters('page'))
 
     download_delay = 0.9
 
diff --git a/kingfisher_scrapy/spiders/openopps.py b/kingfisher_scrapy/spiders/openopps.py
index e5d6ee32..1d9e22e9 100644
--- a/kingfisher_scrapy/spiders/openopps.py
+++ b/kingfisher_scrapy/spiders/openopps.py
@@ -56,8 +56,7 @@ def from_crawler(cls, crawler, *args, **kwargs):
         spider.username = crawler.settings.get('KINGFISHER_OPENOPPS_USERNAME')
         spider.password = crawler.settings.get('KINGFISHER_OPENOPPS_PASSWORD')
         if spider.username is None or spider.password is None:
-            spider.logger.error('Please set the environment variables '
-                                'KINGFISHER_OPENOPPS_USERNAME and KINGFISHER_OPENOPPS_PASSWORD')
+            spider.logger.error('KINGFISHER_OPENOPPS_USERNAME and/or KINGFISHER_OPENOPPS_PASSWORD is not set.')
             raise scrapy.exceptions.CloseSpider('authentication_credentials_missing')
 
         return spider
diff --git a/kingfisher_scrapy/spiders/paraguay_dncp_base.py b/kingfisher_scrapy/spiders/paraguay_dncp_base.py
index 30580bfb..0a1b63c2 100644
--- a/kingfisher_scrapy/spiders/paraguay_dncp_base.py
+++ b/kingfisher_scrapy/spiders/paraguay_dncp_base.py
@@ -1,5 +1,4 @@
 import json
-import logging
 from datetime import datetime
 
 import scrapy
@@ -44,7 +43,7 @@ def from_crawler(cls, crawler, *args, **kwargs):
         spider.request_token = crawler.settings.get('KINGFISHER_PARAGUAY_DNCP_REQUEST_TOKEN')
 
         if spider.request_token is None:
-            logging.error('No request token available')
+            spider.logger.error('KINGFISHER_PARAGUAY_DNCP_REQUEST_TOKEN is not set.')
             raise scrapy.exceptions.CloseSpider('authentication_credentials_missing')
 
         return spider
diff --git a/kingfisher_scrapy/spiders/paraguay_hacienda.py b/kingfisher_scrapy/spiders/paraguay_hacienda.py
index 522dbde9..d25ae23b 100644
--- a/kingfisher_scrapy/spiders/paraguay_hacienda.py
+++ b/kingfisher_scrapy/spiders/paraguay_hacienda.py
@@ -34,7 +34,8 @@ def from_crawler(cls, crawler, *args, **kwargs):
         spider.request_token = crawler.settings.get('KINGFISHER_PARAGUAY_HACIENDA_REQUEST_TOKEN')
         spider.client_secret = crawler.settings.get('KINGFISHER_PARAGUAY_HACIENDA_CLIENT_SECRET')
         if spider.request_token is None or spider.client_secret is None:
-            spider.logger.error('No request token or client secret available')
+            spider.logger.error('KINGFISHER_PARAGUAY_HACIENDA_REQUEST_TOKEN and/or '
+                                'KINGFISHER_PARAGUAY_HACIENDA_CLIENT_SECRET is not set.')
             raise scrapy.exceptions.CloseSpider('authentication_credentials_missing')
 
         return spider
diff --git a/kingfisher_scrapy/spiders/portugal.py b/kingfisher_scrapy/spiders/portugal.py
index fdf25ba7..263aef58 100644
--- a/kingfisher_scrapy/spiders/portugal.py
+++ b/kingfisher_scrapy/spiders/portugal.py
@@ -12,7 +12,6 @@ class Portugal(ZipSpider):
     encoding = 'iso-8859-1'
     zip_file_format = 'json_lines'
 
-    download_warnsize = 0
     download_timeout = 9999
 
     def start_requests(self):
diff --git a/kingfisher_scrapy/spiders/uk_contracts_finder.py b/kingfisher_scrapy/spiders/uk_contracts_finder.py
index baf3dce3..f33acf93 100644
--- a/kingfisher_scrapy/spiders/uk_contracts_finder.py
+++ b/kingfisher_scrapy/spiders/uk_contracts_finder.py
@@ -1,10 +1,10 @@
 import json
 
-from kingfisher_scrapy.base_spider import BaseSpider
-from kingfisher_scrapy.util import components, handle_error, parameters, replace_parameter
+from kingfisher_scrapy.base_spider import SimpleSpider
+from kingfisher_scrapy.util import handle_error, parameters, replace_parameter
 
 
-class UKContractsFinder(BaseSpider):
+class UKContractsFinder(SimpleSpider):
     name = 'uk_contracts_finder'
     data_type = 'release_package_list_in_results'
     encoding = 'iso-8859-1'
@@ -22,4 +22,4 @@ def parse_list(self, response):
             total = data['maxPage']
             for page in range(2, total + 1):
                 url = replace_parameter(response.request.url, 'page', page)
-                yield self.build_request(url, formatter=components('page'))
+                yield self.build_request(url, formatter=parameters('page'))
diff --git a/kingfisher_scrapy/spiders/uk_fts.py b/kingfisher_scrapy/spiders/uk_fts.py
index 6c172dbf..ed3fd46b 100644
--- a/kingfisher_scrapy/spiders/uk_fts.py
+++ b/kingfisher_scrapy/spiders/uk_fts.py
@@ -7,7 +7,7 @@
 class UKContractsFinder(LinksSpider):
     name = 'uk_fts'
     data_type = 'release_package_in_ocdsReleasePackage_in_list_in_results'
-    next_page_formatter = parameters('cursor')
+    next_page_formatter = staticmethod(parameters('cursor'))
 
     def start_requests(self):
         # This URL was provided by the publisher and is not the production URL.
diff --git a/kingfisher_scrapy/util.py b/kingfisher_scrapy/util.py
index f20487f5..cba2376e 100644
--- a/kingfisher_scrapy/util.py
+++ b/kingfisher_scrapy/util.py
@@ -96,7 +96,7 @@ def replace_parameter(url, key, value):
     parsed = urlsplit(url)
     query = parse_qs(parsed.query)
     if value is None:
-        del query[key]
+        query.pop(key, None)
     else:
         query[key] = [value]
     return parsed._replace(query=urlencode(query, doseq=True)).geturl()
diff --git a/tests/test_util.py b/tests/test_util.py
new file mode 100644
index 00000000..4d118cc4
--- /dev/null
+++ b/tests/test_util.py
@@ -0,0 +1,12 @@
+import pytest
+
+from kingfisher_scrapy.util import replace_parameter
+
+
+@pytest.mark.parametrize('url,value,expected', [
+    ('http://example.com/?page=1', 2, 'http://example.com/?page=2'),
+    ('http://example.com/?page=1', None, 'http://example.com/'),
+    ('http://example.com/', None, 'http://example.com/'),
+])
+def test_replace_parameter(url, value, expected):
+    assert replace_parameter(url, 'page', value) == expected
diff --git a/tests/test_zip_spider.py b/tests/test_zip_spider.py
index 2c464f82..cdd936c2 100644
--- a/tests/test_zip_spider.py
+++ b/tests/test_zip_spider.py
@@ -51,9 +51,18 @@ def test_parse_json_lines(sample, len_items):
 
     response = response_fixture(body=io.getvalue())
     generator = spider.parse(response)
+    item = next(generator)
     items = list(generator)
 
-    # assert len(items) == len_items
+    assert type(item) is File
+    assert len(item) == 6
+    assert item['file_name'] == 'test'
+    assert item['url'] == 'http://example.com'
+    assert item['data_type'] == 'zip'
+    assert item['encoding'] == 'utf-8'
+    assert item['post_to_api'] is False
+
+    assert len(items) == len_items
 
     for i, item in enumerate(items, 1):
         assert type(item) is FileItem
@@ -83,8 +92,17 @@ def test_parse_release_package(sample, len_items, len_releases):
 
     response = response_fixture(body=io.getvalue())
     generator = spider.parse(response)
+    item = next(generator)
     items = list(generator)
 
+    assert type(item) is File
+    assert len(item) == 6
+    assert item['file_name'] == 'test'
+    assert item['url'] == 'http://example.com'
+    assert item['data_type'] == 'zip'
+    assert item['encoding'] == 'utf-8'
+    assert item['post_to_api'] is False
+
     assert len(items) == len_items
 
     for i, item in enumerate(items, 1):